Hollow anti-scale oil pump

Abstract

The invention provides a hollow anti-scale oil pump which can effectively prevent scale deposition as well as preventing pumping from being blocked during pumping oil, so as to decrease the repair and maintenance cost of an oil production device as well as ensuring smooth oil production work. The hollow anti-scale oil pump comprises a pump barrel assembly, a long plunger piston assembly and a fixing valve assembly; the pump barrel assembly comprises an oil pipe coupling, an upper lengthening pumping barrel, a pump barrel coupling, a short pump barrel, and a lower lengthening pump barrel on the lower surface of the short pump barrel; the long plunger piston assembly comprises a hollow short rod, an upper reducing coupling, an upper one-way valve device, an one-way valve bus, an upper valve seat connector, a pulling rod bus, a hollow pulling rod, an oil outlet cover, a plunger piston, a floating valve seat, a floating valve ball, a lower reducing coupling, a lower one-way valve device and a piston block; the upper one-way valve device and the lower one-way valve device both comprise connectors, valve balls arranged in the connectors, and valve seats; the fixing valve assembly comprises a pump barrel valve cover, a fixing valve ball, a fixing valve seat and a pump barrel valve cover reducing connector.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to a hollow anti-scaling oil well pump. Background technique [0002] At present, for oil fields that have entered the middle and late stages of development, in order to further stabilize crude oil production and improve crude oil recovery, ASP flooding technology is widely used in the process of oil exploitation. Although the application of ASP flooding technology has improved the recovery rate of the oil field, calcium silicate, calcium carbonate, magnesium carbonate and other salt mixed scales will be formed in the oil produced. Scale or sand easily enters the gap between the plunger and the pump barrel, and deposits on the surface of the sucker rod, oil pipe, and oil well pump. Scaling makes the gap between the pump barrel and the plunger gradually smaller, and the plunger of the oil well pump is frequently stuck. , The pump inspection cycle is shortened, res...

AI Technical Summary

Problems solved by technology

Although the application of ASP flooding technology has improved the recovery rate of the oil field, calcium silicate, calcium carbonate, magnesium carbonate and other salt mixed scales will be formed in the oil produced. Scale or sand easily enters the gap between the plunger and the pump barrel, and deposits on the surface of the sucker rod, oil pipe, and oil well pump. Scaling makes the gap between the pump barrel and the plunger gradually smaller, and the plunger of the oil well pump is frequently stuck. , the pump inspection cycle is shortened, resulting in a decrease in production efficiency and an increase in cost, which brings great difficulties to oil production operations in the oil field

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